EP 3998225 A4 20220907 - WORK MACHINE
Title (en)
WORK MACHINE
Title (de)
ARBEITSMASCHINE
Title (fr)
ENGIN DE CHANTIER
Publication
Application
Priority
- JP 2019165955 A 20190912
- JP 2020032530 W 20200828
Abstract (en)
[origin: EP3998225A1] Provided is a work machine (100) capable of effectively discharging air from a hydraulic circuit of a winch unit (10) capable of applying braking to a winch drum (1) by receiving a working oil. The work machine (100) includes: a winch unit (10) having a winch drum (1), a winch motor (20), a cylinder portion (3) and a clutch portion (4); a hydraulic sources (24); a braking operating unit (25a); a brake valve (25b); a connecting portion (QC1); and a throttle portion (26A). The throttle portion (26A) includes an opening having an opening diameter that is set so as to hold a pressure in a positive oil chamber (3P) for generating a brake force applied to the winch drum (1) and to discharge a working oil from the positive oil chamber (3P).
IPC 8 full level
B66D 5/26 (2006.01); B66D 1/14 (2006.01); F15B 11/08 (2006.01); F15B 21/044 (2019.01)
CPC (source: EP US)
B66D 1/14 (2013.01 - EP); B66D 1/16 (2013.01 - US); B66D 5/26 (2013.01 - EP US)
Citation (search report)
- [A] JP 2016196340 A 20161124 - KOBELCO CRANES CO LTD
- [A] JP 2002317802 A 20021031 - CATERPILLAR MITSUBISHI LTD
- [A] JP H1192089 A 19990406 - KOBE STEEL LTD
- See also references of WO 2021049317A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
EP 3998225 A1 20220518; EP 3998225 A4 20220907; EP 3998225 B1 20240703; JP 2021042050 A 20210318; JP 7327022 B2 20230816; US 12006193 B2 20240611; US 2022297991 A1 20220922; WO 2021049317 A1 20210318
DOCDB simple family (application)
EP 20863300 A 20200828; JP 2019165955 A 20190912; JP 2020032530 W 20200828; US 202017636178 A 20200828